gtk.editable

The #GtkEditable interface is an interface which should be implemented by text editing widgets, such as #GtkEntry and #GtkSpinButton. It contains functions for generically manipulating an editable widget, a large number of action signals used for key bindings, and several signals that an application can connect to to modify the behavior of a widget.

As an example of the latter usage, by connecting the following handler to #GtkEditable::insert-text, an application can convert all entry into a widget into uppercase.

Forcing entry to uppercase.

#include <ctype.h>;

void
insert_text_handler (GtkEditable *editable,
                    const gchar *text,
                    gint         length,
                    gint        *position,
                    gpointer     data)
{
 gchar *result = g_utf8_strup (text, length);

 g_signal_handlers_block_by_func (editable,
                              (gpointer) insert_text_handler, data);
 gtk_editable_insert_text (editable, result, length, position);
 g_signal_handlers_unblock_by_func (editable,
                                    (gpointer) insert_text_handler, data);

 g_signal_stop_emission_by_name (editable, "insert_text");

 g_free (result);
}